Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ca0b73d72f01d26c5a87bcaf184d9574ca9f295af83593771ccbf9c76392ff1' 
  AND token = 'I8LX59Fa7Kvjh37K1TkvyVwM00P8dM4OfQkX+V1OtY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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