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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ca1d6284063233bd0f0b1eb670e58e82e3c2108c69bf77cf916f3767ce9cade' 
  AND token = 'oFBO85aU3e5+hICDppZnNHybK5dbnaSTu0ZzHaP3jQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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