SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9440e987925c686ca4e2bc581fa786cbccb2872ef43225682aeca491e0d6e5cd' 
  AND token = 'JgQZxwno6V41YvggYD4XzYKxpcMoAdSu4+Q0ljirxho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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