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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6e1ffb6062281b3103e5f57e44334dd4aa50e79a95dff653b029c47a3d30625' 
  AND token = 'wWxGmqWA2waMEL9650aKKHFIu+efk42w42zl/ehtaZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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