Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cd93393e34ef0c9ed9a92e85bba5a93e7471bc57adbfa470f3fa93a2c516325' 
  AND token = 'DwiAxa5n2AjjaZnKkJeSasNB3bkssceEfD7vz0m6mOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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