Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfc6393eb861f5ef3c6a7979cf3e5e011096e3959cebd454434d0310d631c1eb' 
  AND token = 'bgYDNnq4+WUgyycW92BYWuLMtQlfNPBQs+kqcfDMC2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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