Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ccaac0eaeef8a6f2668eed56f83e764aae0d13702991c03f99d0acf8fcf7de5' 
  AND token = 'Abjk4LxZz4nQEjFd4BBdypWg2yVHNdcmpNt8HVng360=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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