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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6ee39f67ac401e98318e06be647a67391974bcb52704cd8711ffacc18c3b046' 
  AND token = 'i2D5xB5wBJLiJutFPvDlMaaAG31cE7SVyBEntUvmWGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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