SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd963057d5c145ab1d9898e74eed05cac2bf4fbf2fc94ef168d5be826b592acbd' 
  AND token = '+Rzom8JdaOUIVRpwql46xviGBu46uJ/60dHDoLqr8uA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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