Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca100187f0a08b61de508782b911a9eb746b32722f8e1598376d29c126a22a46' 
  AND token = 'dFY16vvbq0t93Avv6Otv/bDcT4oNEkGBjQaDKSJS4Gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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