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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72505955683ab98066b3fe7d63f81abd4205dd9d24dc6b5bc1c486db4f558fc6' 
  AND token = 'M2Zm9MHn1eQ/qPt4xz4yTrIbTGToVpq8PwlQtayKPxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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