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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4410c419e9895ff15fb45ab3eeaa59dc076e41746b41373dfef178e903b1fa2e' 
  AND token = '/Ilzx9CK2qs14zQnt/mN31hEzGen9bvH4gRatX/g34E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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