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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb05d0a68e2d56936a9f1fa37287986a2b8dff26737d29b6f233a4ca00966ded' 
  AND token = 'PZTsTOJ8sq48h0keylZzj0w6m8lHg7XbvY66ZcypOdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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