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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80bb2ce104f017e87a675cc5b909f42c6dbb207dcbd96ab99568c39d9ba35afe' 
  AND token = 'BLqMdFBdwZVvf7krGKcMuT20QV/oQFam+ac1GWkDRco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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