Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'febc01f2a27ac7ee7673405e2d997c32bd636ba82561c2125e0f927ecd711072' 
  AND token = 'lf0ai+HhnyGHBojM4hDJCaQf3oO9WTQFEk8AfcZgwJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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