Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '68aff2c3c5be0329760be6c967a50ed79db165857f1556679b12e98691a2a503' 
  AND token = 'coAU6CSHIQKfJl9RhhSkPhpNAtoX0z9Cs8vQf6v6pr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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