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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a433b1c60c737d1222c44e563b325d45f371ef85a680d1e8eef4f9cce211ae8' 
  AND token = 'Fz02O5jL2A7jWvcqpjib440OxhgsJ6SAKQr1mgXFW50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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