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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '85229098340966d15d69a2ef054d80718790871fd309ebd43043c9d193773a41' 
  AND token = 'yUpHkadR2MvDnd73cET5Vy4a02j3o4SISVFOBukrJ0g=' 
  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"
    }
  }
}