Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '538fc2780ce4e494543ccb406f79b509f0c1aad10786794240d2d2e02c572a6e' 
  AND token = 'TXUuU4iJOIA6Uq3KykDE5zX2ihh43VGeXCDZn0T4BVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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