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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5c433c0872a7bb1bb22be150cd8d589218a35cf7579ce346583586a2c87dd9af' 
  AND token = 'AU4gtA4wyN5tByXiGdglDrqlcYm2vt680Ymgd1HCiNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}