Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62023ada371ee78862275619f9e0d57d41b580a0b6fa48b56e2aaaeb7a424f3e' 
  AND token = 'fyq64/9NaTM+F7IwcxxBdKHR2Z4dLLcsXZlmPDrUUBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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