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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07010cac378ce07a5b905b1e99db7c1b113f356856c9d90c3587e359ed6c1d88' 
  AND token = 'UclzAzmLQ+uLhW3nzKGcMHZMaS3EBBMJskHaeF1g+78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}