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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '468b94df479ed228e41a99a1bfbab2059422a25cc0386c6c2b34b8f6e4e3f0ad' 
  AND token = 'ZXPAGO5E1R3ojVCZHM+mEDf0kNjP9t3Q4Wwb0VjItwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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