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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a05b36565ad30adaa5ea89984fe2bb6582a7c1af2a3e2b5c37893d8bc6081c5d' 
  AND token = '06NZvtsN+QcdjNOzJn6uueHINDce4b7R9wP6W8oTJfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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