Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88a7e684c4eb5380d6eb1f283f8eeeda652e1fbd24fec1e40135328b516f6e49' 
  AND token = 'zjeTP58dEA7LgimfFaGhVMrDjskScm68ehX6GtP36lU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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