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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ba9682d1ac239e6fe868813a9a47d3455b39730ce998584b493d3db26f51979' 
  AND token = '26goidkODrJ9icpXkbX/QlRt2AEZZMXCTcAlqCY1YqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}