Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '28123e17ef31fa11bf309bf29d86146d0a16b9d77acfa40f8424845e5d000c1b' 
  AND token = 'rJ5ejIcRFH2toNjr/uXt1q6NHbUb1giqPhZy4sByaWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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