Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e45d017ca86a22cb0339bc637deb747368f3db03d6f56b65e635c833137d33fa' 
  AND token = 'G/cx3a7mowNzI2LNLpF5HebgfsGSBnOvST91MS49Mls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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