Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70912d4dd6a4d74545ef8d34b792084a02e6665068b9a24964915bbbf7bc5f6e' 
  AND token = 'LPuxgAh0HNkoi4R8VPUDnr9YC/YemkBfNFDhjIH95Mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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