Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eeecba2a9b5dd9993557e407ca69090c8a228091dc3e4479cb65b14e93478707' 
  AND token = 'n4o82q8Lw7xW9jvpIcbUJfN7YYeppRFg7sA7JceMAGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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