SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99c79774b17080942956be20d0a134169d1c9ac84847cca82f3cd0db9a8b0207' 
  AND token = 'rGCOFDJgzOvhUwfkQZRJF9x7RNzVigl8CEfa8IL3GUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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