Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '680be18c5cc9eb3fefe3c1fa4f47cee9ffa35ef6c75622109ea6d9b2669ef3e0' 
  AND token = '//IovXH0xialUbeGbL5qBo2UprPJTt4nCgr6ptA5CVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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