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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07c19486d0358d07fc184733fec52a833a7cc5a1ec73b9764e66ab6b5e2c7b0f' 
  AND token = '3AYUp+E90oKTGodN83sfIg2elyjm9yR+PhBOAyYP/AE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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