SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '073cda814949b3600464b15ffe6ac22f8559775fbf51a7a80e12eb669f10e93d' 
  AND token = 'Ssj/Y5OzpI16ujhhgxWGfsuOrbH+Imaue3DRYdc+W3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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