SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62a848457407aeacc90d99827d6d2ec1a35a8cc81994af0902d123d9dbd833f5' 
  AND token = 'UX3rAOe1GeVg/B9bpbZ4wBFAuF9lwJMHbg8Di+YiKq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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