Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58d3647441826229609286a17d7ed44da1f59fd54cbe70f426ea02a010b0cada' 
  AND token = 'v7eSDWaUjbQJiQueynQzyvrla4SdueFiberX2Xmoo6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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