Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8a9235b16b2b5f0e2e3472a970990336ff62a0b5941ccf1f009a9c178fc5209' 
  AND token = 'Jp/EEqceTSXCBEEWf+23jNKB6/u9KG57egbHOZTqHqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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