Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfca02910cde5b1376dcfe7054202ba867d370b1d01a787b03bd23111e4e0c8b' 
  AND token = 'fbnI+k14JF1mP2gWQ5dBmg2NF1PoPr7q3UEOGyoeKBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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