Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5485ea9a0f06c97e80a2b1e0449abb893e9133a32678e7fe9acb81c11eb23aee' 
  AND token = 'dp5qT+z1LOlU8S6mfcu1Bqg42K3AFpRLB6Ij5qUro38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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