Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed475ebf18fdcd6d02b2efd88eea39b8f805ba3de01d6e834e59e7c8c08857f3' 
  AND token = '9Em+czLVOKmE234c6uEMXHKdaj1n7qYc4AsrD4FZtpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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