Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd79b4d70d248d5a79f800196df03083aa3289129cbaec96150ee639e61aae635' 
  AND token = '4/O1wvUnFUP650FX1frjtfIvVXyXbKZAU94snfHw50g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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