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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '986b8c01720044f8547307c98fbac546cc6aa8c4c6b066bb53c46d29054acef2' 
  AND token = 'CncTR7t2E/zNe0+F5Wpc1vqzprjlsRcGS3DYqtGRteM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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