SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ddb53063cea1ef68aa643579d1b3ff6293b7fa8298be7594d2bb9b5f8d0de51' 
  AND token = 'q5syx/np8Fi++oMex9IVXi/hAsRkgbYI0gwO9KrxYK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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