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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89e2a41448c8a38bd384d4dea16d3ac3757ed6aadad5a6e8f7e8a553d9d2cc64' 
  AND token = 'H/oiTKq2tUtKCQg+DdLnkuCy/dL74JEUCgj3339H05s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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