SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e03df2f5b22cc91f7a5569dfb724bd969805602b32de6f8c5add518cfad30366' 
  AND token = 'uQVXx80IVx0T+m8gHFuFO9YYommtUzUVQwnwq7I5epI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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