Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2188c19a25087abaeed0996b97769d4a9f1a23e087e678a1199d8add83bb891' 
  AND token = 'Gv6M5BbAXVNz3mMBOcPKmzJmA55A8fKZmvr3ya2qU0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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