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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '814f9b7cd1bf8285ee91a0169ae5ab9591f62b073321eb851571adca269e6298' 
  AND token = 'unyIb7Z9b4ZZnfRO0VFxk+wJJWAITE4gPAORuIlyVJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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