Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4635a6e121852b09a3fb7c2197a1de725b001393d00b3bd5bb90a3f98be3fc73' 
  AND token = '41vODFi4kvJrQh/Hkq6n4kFczgRMWnbXN97H0g8wkjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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