Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6d2127d83d8075d1ddc48b31355714e022781333de5b0577d57ca9f40e668810' 
  AND token = 'Z4eopf/SvQKd6ZhjtMYyS5vuTq2gAgdto7Gy7lgk4n0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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