SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f49db70a095c5eb831ed12e7191dc7bd673b06a3742d290027d4d5f4491b6ca9' 
  AND token = 'xdyGsV97U14wVa17JMA9RYIh+TAmYL+KjhgSf2txGjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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