Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a70ed8b10de6eb75a288b7cd66f9a0786542558703e583c6b0eac83e6de5ab95' 
  AND token = 'AasQgV4hE8ehQbNGGMoE7gIXSRB18vnIt+ArhFGfMro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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