Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcd608766da352aa46c798ec66b8c25c3ec0e045666ed7b18f2483616f1d305f' 
  AND token = 'm7F6Tx+dPoIoCMBEy+k84y0WIJ+RRcpNCtx7DVOaLFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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