SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8820f9ac7eba2ecb3848ef3459ffbd9715762e6011f3990b610c8a699c85256b' 
  AND token = 'XDWRmvnmQf8aKmyTazpZAYNOGrVYQ/iqVb7vqdKoYRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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