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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae1d75329f4b78e396ba2bd4a29d0adb055b4168d3842baccb4f05c64d8e8f77' 
  AND token = '2gQmTF6FR3rIp3/MJHsMrUNg5k3dpw9kvdX4Jlskpjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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