Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aec5f1da12ad47d066deefdf814493e53ce04dccef9e3f1160e1cb3ff5e367f2' 
  AND token = 'EBOCeq4Y6kpyYT1MWjEXORgBnz19aVBvwlvQUQRLXGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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