Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '18cb9ef652f7e0ee985f3d1660fa58e98312866ffb8cf6ff940c05fee671825c' 
  AND token = 'A9Hec9hQ1eBEqA5kov0CKmNVm/45SRdWW8zfXafzOPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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