Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b0c6d0f1d87a1a8ba6545e2f3c4d36b5f6fc06f246c98a39cb26eb6c22b865b2' 
  AND token = 'epBjrv7avXnk9quYAzD/aIB3g95crfr9cmhpbBmaIbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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