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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b18699fb6aa30bcb9a3bff33566177a9a745780afef3ed3fd04abf069c3e3eb' 
  AND token = '3EcOpkrkdoPnIzfLFIcssDkeqPLLvp+D4zUnxPG0A8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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