Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '289ce6d6836403522acf625efb6bf16daf53b530c84679e0a2b30ed8acbab0b1' 
  AND token = '7GU5PLJwpvmT3/uaUptRpDNHIqBW0IWSYwD/LXbvgwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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