Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e6687e5eecaa14614086a3ca6758cc4525986c9bac42b83dbeee5afe951c26cf' 
  AND token = 'zMSAFtUFZUulm/Sr/ZWi6HpWMM+CVXVkeHtgUvWDukM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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