Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba15894f026f8fd4373a7d868de5560bea47da493f1e31a7c7a3b6baa28f817' 
  AND token = 'DrW3kmVYGGieMVu0/f+FFlAClson3r45td4dHkYF+tQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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