Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6dab569ae1b65610088e44f7f44a58ebb7254761d28580851c99fa874282bc5e' 
  AND token = 'EXbT0abeJlZ6NPfj+1z43GAYhq5TY+YerxklE2CPRY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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