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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ce9a4439a8ab61a401a00d3a6c66359e2a7a66c06ab97fed38dbeb3c8d6809f' 
  AND token = 'zaYHZCI1P+h6a5DPTtuxQCWXa7yX9DibTUIh93x3PFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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