Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06c17cfa69bb5d2f454f7db1b561b02878742972af0f4102f67c2824de52a00a' 
  AND token = 'ZiWiMGzFrWeU4vysenKqK1oalvCsu+NeFBegOxj1AaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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