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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05fd6f9648f630819dd5224b6586f9b16af26c6c1a68ce3c57ca540d26d8e5be' 
  AND token = '8NURmju3fB6EvFuCSN1yeXncwQE1wltkx1RvQNA/e/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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