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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f36261660e4bab6ecd97b75a1a2d57f107e69138e5c82fe50a74006ecaa715c9' 
  AND token = 'D2VDxmh8oyoAgH2T7USQ4LLpcfg6qZLVkh/K32h3xxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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